That dial is from an Ed White. The 145.012-67 has Professional text and wide spaced T's. It is not a Pre-Pro as you call it and never was. It's a Franken, you'll need to see the inner caseback and serial number to figure out how it started life.
Serial looks to be 26.44m? There you go then. It’s a 145.012-67 made around mid 1968 with swapped in Ed White Dial. A nice thing but not worth as much as an all correct example. Unless you already own an Ed White with a swapped in Pro dial that is.